/*
 * Copyright 2015 The Error Prone Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.errorprone.bugpatterns;

import com.google.errorprone.CompilationTestHelper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** {@link UnnecessaryStaticImport}Test */
@RunWith(JUnit4.class)
public class UnnecessaryStaticImportTest {

  private final CompilationTestHelper compilationHelper =
      CompilationTestHelper.newInstance(UnnecessaryStaticImport.class, getClass());

  @Test
  public void positive() {
    compilationHelper
        .addSourceLines(
            "b/B.java",
            """
            package b;

            public class B {
              public static class Inner {}
            }
            """)
        .addSourceLines(
            "Test.java",
            """
            // BUG: Diagnostic contains: import b.B.Inner;
            import static b.B.Inner;

            class Test {}
            """)
        .doTest();
  }

  @Test
  public void positiveRename() {
    compilationHelper
        .addSourceLines(
            "a/A.java",
            """
            package a;

            public class A {
              public static class Inner {}
            }
            """)
        .addSourceLines(
            "b/B.java",
            """
            package b;

            import a.A;

            public class B extends A {}
            """)
        .addSourceLines(
            "b/Test.java",
            """
            package b;

            // BUG: Diagnostic contains: import a.A.Inner;
            import static b.B.Inner;

            class Test {}
            """)
        .doTest();
  }

  @Test
  public void negativeStaticMethod() {
    compilationHelper
        .addSourceLines(
            "a/A.java",
            """
            package a;

            public class A {
              public static class Inner {
                public static void f() {}
              }
            }
            """)
        .addSourceLines(
            "b/B.java",
            """
            package b;

            import a.A;

            public class B extends A {}
            """)
        .addSourceLines(
            "b/Test.java",
            """
            package b;

            import static a.A.Inner.f;

            class Test {}
            """)
        .doTest();
  }

  @Test
  public void negativeGenericTypeStaticMethod() {
    compilationHelper
        .addSourceLines(
            "a/A.java",
            """
            package a;

            public class A {
              public static class Inner<T> {
                public static void f() {}
              }
            }
            """)
        .addSourceLines(
            "b/B.java",
            """
            package b;

            import a.A;

            public class B extends A {}
            """)
        .addSourceLines(
            "b/Test.java",
            """
            package b;

            import static a.A.Inner.f;

            class Test {}
            """)
        .doTest();
  }

  @Test
  public void negative() {
    compilationHelper
        .addSourceLines(
            "a/A.java",
            """
            package a;

            public class A {
              public static class Inner {}
            }
            """)
        .addSourceLines(
            "b/B.java",
            """
            package b;

            import a.A;

            public class B extends A {}
            """)
        .addSourceLines(
            "b/Test.java",
            """
            package b;

            import a.A.Inner;

            class Test {}
            """)
        .doTest();
  }
}
